Force diff line to UTF-8 encoding - proper fix.

app/helpers/commits_helper.rb

@@ -67,7 +67,7 @@ module CommitsHelper
         line_new = line.match(/\+[0-9]*/)[0].to_i.abs rescue 0
                 
         next if line_old == 1 && line_new == 1
-        yield(line, type, nil, nil, nil)
+        yield(full_line, type, nil, nil, nil)
         next
       else
         type = diff_line_class(line)